If you know what Ramadan is, you'll understand this:
Eid al-Fitr is on the first day of the month of Shawwal. Shawwal is the month that follows Ramadan in the calendar of Islam. In Eid al-Fitr people give charity to those in need and celebrate with friends and family.
No one founded it, it's a muslim holiday... basically like Christmas..., can't really ask anyone who found Christmas eh?
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Kwanzaa is a African holiday celebrated throughout the world honoring African heritage. From what I know it's a week long, and people light a kinara)(that's like a candelish thingy)... It's celebrated from December 26 to January 1st each year... It was created by Maulana Karenga.
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Eid ul-fitr and Kwanzaa have absolutely nothing in common, Eid ul-fitr is a religious holiday, Kwanzaa is not... But, the only possible thing that they could have in common is the fact that they're holidays, and people always get together on holidays right?
Good luck on your paper :)